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The Mexico–United States barrier ( es, barrera Estados Unidos–México), also known as the border wall, is a series of vertical barriers along the
Mexico–United States border The Mexico–United States border ( es, frontera Estados Unidos–México) is an international border separating Mexico and the United States, extending from the Pacific Ocean in the west to the Gulf of Mexico in the east. The border trave ...
intended to reduce
illegal immigration to the United States Illegal immigration to the United States is the process of migrating into the United States in violation of federal immigration laws. This can include foreign nationals (aliens) who have entered the United States unlawfully, as well as tho ...
from
Mexico Mexico (Spanish language, Spanish: México), officially the United Mexican States, is a List of sovereign states, country in the southern portion of North America. It is borders of Mexico, bordered to the north by the United States; to the so ...
. The barrier is not a continuous structure but a series of obstructions variously classified as "fences" or "walls". Between the physical barriers, security is provided by a "virtual fence" of sensors, cameras, and other surveillance equipment used to dispatch
United States Border Patrol The United States Border Patrol (USBP) is a federal law enforcement agency under the United States' Customs and Border Protection and is responsible for securing the borders of the United States. According to its web site in 2022, its mission ...
agents to suspected migrant crossings. In May 2011, the
Department of Homeland Security The United States Department of Homeland Security (DHS) is the U.S. federal executive department responsible for public security, roughly comparable to the interior or home ministries of other countries. Its stated missions involve anti-ter ...
(DHS) stated that it had of barriers in place. An additional 52 miles of primary barriers were built during
Donald Trump's presidency Donald Trump's tenure as the 45th president of the United States began with his inauguration on January 20, 2017, and ended on January 20, 2021. Trump, a Republican from New York City, took office following his Electoral College victory ...
. The total length of the national border is . On July 28th 2022, the Biden administration announced it would fill four wide gaps in Arizona near Yuma, an area with some of the busiest corridors for illegal crossings.


Description

The border between the United States and Mexico traverses a variety of terrains, including urban areas and deserts. The border from the
Gulf of Mexico The Gulf of Mexico ( es, Golfo de México) is an ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of the United ...
to
El Paso, Texas El Paso (; "the pass") is a city in and the seat of El Paso County in the western corner of the U.S. state of Texas. The 2020 population of the city from the U.S. Census Bureau was 678,815, making it the 23rd-largest city in the U.S., the ...
, follows along the
Rio Grande The Rio Grande ( and ), known in Mexico as the Río Bravo del Norte or simply the Río Bravo, is one of the principal rivers (along with the Colorado River) in the southwestern United States and in northern Mexico. The length of the Rio G ...
forming a natural barrier. The barrier is located on both urban and uninhabited sections of the border, areas where the most concentrated numbers of illegal crossings and
drug trafficking A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drugs are typically distinguished from food and substances that provide nutritional support. Consumption of drugs can be via inhalati ...
have been observed in the past. These urban areas include
San Diego San Diego ( , ; ) is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States ...
, California, and El Paso, Texas.Sapp, Lesley (July 2011)
''Apprehensions by the U.S. Border Patrol: 2005–2010''
Office of Immigration Studies,
United States Department of Homeland Security The United States Department of Homeland Security (DHS) is the U.S. federal executive department responsible for public security, roughly comparable to the interior or home ministries of other countries. Its stated missions involve anti-ter ...
( Washington, D.C.) Retrieved November 18, 2011
The fencing includes a steel fence (varying in height between 18 and 27 feet) that divides the
border town A border town is a town or city close to the boundary between two countries, states, or regions. Usually the term implies that the nearness to the border is one of the things the place is most famous for. With close proximities to a different cou ...
s of
Nogales, Arizona Nogales (English: or , ; ) is a city in Santa Cruz County, Arizona. The population was 20,837 at the 2010 census and estimated 20,103 in 2019. Nogales forms part of the larger Tucson–Nogales combined statistical area, with a total populatio ...
, in the U.S. and
Nogales, Sonora Heroica Nogales (), more commonly known as Nogales, is a city and the county seat of the Municipality of Nogales. It is located on the northern border of the Mexican state of Sonora. The city is abutted on its north by the city of Nogales, Arizo ...
, in Mexico.Peter Holley
"Trump proposes a border wall. But there already is one, and it gets climbed over"
''Washington Post'' (April 2, 2016).
97% of border apprehensions (foreign nationals who are caught being in the U.S. illegally) by the Border Patrol in 2010 occurred at the southwest border. The number of Border Patrol apprehensions declined 61% from 1,189,000 in 2005 to 723,842 in 2008 to 463,000 in 2010. The decrease in apprehensions are the result of numerous factors, including changes in U.S. economic conditions and border enforcement efforts. Border apprehensions in 2010 were at their lowest level since 1972. Total apprehensions for 2017, 2018, and 2019 were 415,517, 521,090, 977,509 respectively. This shows a recent increase in apprehensions. And while the barrier is along the Mexico-United States border, 80% of the apprehended crossers are non-Mexican. As a result of the barrier, there has been a significant increase in the number of people trying to cross areas that have no fence, such as the
Sonoran Desert The Sonoran Desert ( es, Desierto de Sonora) is a desert in North America and ecoregion that covers the northwestern Mexican states of Sonora, Baja California, and Baja California Sur, as well as part of the southwestern United States (in Ariz ...
and the Baboquivari Mountains in Arizona. Such immigrants must cross fifty miles (80 km) of inhospitable terrain to reach the first road, which is located in the Tohono O'odham Indian Reservation.


Geography

The Mexico–United States border stretches from the Pacific Ocean in the west to the Gulf of Mexico in the east. Border states include the Mexican states of
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
,
Sonora Sonora (), officially Estado Libre y Soberano de Sonora ( en, Free and Sovereign State of Sonora), is one of the 31 states which, along with Mexico City, comprise the Federal Entities of Mexico. The state is divided into 72 municipalities; the ...
,
Chihuahua Chihuahua may refer to: Places * Chihuahua (state), a Mexican state **Chihuahua (dog), a breed of dog named after the state **Chihuahua cheese, a type of cheese originating in the state **Chihuahua City, the capital city of the state **Chihuahua Mu ...
,
Coahuila Coahuila (), formally Coahuila de Zaragoza (), officially the Free and Sovereign State of Coahuila de Zaragoza ( es, Estado Libre y Soberano de Coahuila de Zaragoza), is one of the 32 states of Mexico. Coahuila borders the Mexican states of N ...
,
Nuevo León Nuevo León () is a state in the northeast region of Mexico. The state was named after the New Kingdom of León, an administrative territory from the Viceroyalty of New Spain, itself was named after the historic Spanish Kingdom of León. Wit ...
, and
Tamaulipas Tamaulipas (), officially the Free and Sovereign State of Tamaulipas ( es, Estado Libre y Soberano de Tamaulipas), is a state in the northeast region of Mexico; one of the 31 states which, along with Mexico City, comprise the 32 Federal Entiti ...
. U.S. states along the border are
California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...
,
Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...
,
New Mexico ) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe, New Mexico, Santa Fe , LargestCity = Albuquerque, New Mexico, Albuquerque , LargestMetro = Albuquerque metropolitan area, Tiguex , Offi ...
, and
Texas Texas (, ; Spanish: ''Texas'', ''Tejas'') is a state in the South Central region of the United States. At 268,596 square miles (695,662 km2), and with more than 29.1 million residents in 2020, it is the second-largest U.S. state by ...
.


History


Origins

Territorial exchanges in the
Mexican-American War Mexican Americans ( es, mexicano-estadounidenses, , or ) are Americans of full or partial Mexican heritage. In 2019, Mexican Americans comprised 11.3% of the US population and 61.5% of all Hispanic and Latino Americans. In 2019, 71% of Mexica ...
(1846–48) and the
Gadsden Purchase The Gadsden Purchase ( es, region=MX, la Venta de La Mesilla "The Sale of La Mesilla") is a region of present-day southern Arizona and southwestern New Mexico that the United States acquired from Mexico by the Treaty of Mesilla, which took effe ...
(1853) would largely establish the current U.S.-Mexico border. Until the early 20th century, the border was open open and largely unpatrolled, with only a few "mounted guards" patrolling its length. However, tensions between the United States and Mexico started to rise with the
Mexican Revolution The Mexican Revolution ( es, Revolución Mexicana) was an extended sequence of armed regional conflicts in Mexico from approximately 1910 to 1920. It has been called "the defining event of modern Mexican history". It resulted in the destruction ...
(1910) and
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...
, which also increased concerns about weapons smuggling, refugees and cross-border espionage. The first international bridge was the Brownsville & Matamoros International Bridge built in 1910. The first barrier built by the U.S. (a barbed wire fence to prevent the movement of cattle across the border) was built in Ambos Nogales between 1909 and 1911. The first barrier built by Mexico was likely a six-foot-tall wire fence built in 1918 explicitly for the purpose of directing the flow of people, also in Ambos Nogales. Barriers were extended in the following decades, with barriers becoming a common feature in border towns by the 1920s. In the 1940s, the U.S. Immigration and Naturalization Service built chain-link barriers along the border. U.S. President George H. W. Bush approved the initial 14 miles of fencing along the San Diego–Tijuana border. In 1993, President
Bill Clinton William Jefferson Clinton (né Blythe III; born August 19, 1946) is an American politician who served as the 42nd president of the United States from 1993 to 2001. He previously served as governor of Arkansas from 1979 to 1981 and again ...
oversaw initial border fence construction which was completed by the end of the year. Starting in 1994, further barriers were built under Clinton's presidency as part of three larger operations to taper transportation of illegal drugs manufactured in Latin America and immigration: Operation Gatekeeper in California, Operation Hold-the-Line in Texas, and Operation Safeguard in Arizona. Clinton signed the Illegal Immigration Reform and Immigrant Responsibility Act of 1996, which authorized further barriers and the reinforcement of the initial border fence. The majority of the border barriers built in the 1990s were made out of leftover helicopter landing mats from the
Vietnam War The Vietnam War (also known by #Names, other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vie ...
.


Bush administration

The Real ID Act, signed into law by President George W. Bush on May 11, 2005, attached a rider to a supplemental appropriations bill funding the wars in
Iraq Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq ...
and
Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan,; prs, امارت اسلامی افغانستان is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia, it is borde ...
, which went into effect in May 2008:
Notwithstanding any other provision of law, the Secretary of Homeland Security shall have the authority to waive all legal requirements such Secretary, in such Secretary's sole discretion, determines necessary to ensure expeditious construction of the barriers and roads.
In 2005, there were 75 miles of fencing along the border. In 2005, the border-located Laredo Community College obtained a 10-foot fence built by the
United States Marine Corps The United States Marine Corps (USMC), also referred to as the United States Marines, is the maritime land force service branch of the United States Armed Forces responsible for conducting expeditionary and amphibious operations through c ...
. The structure led to a reported decline in border crossings on to the campus. U.S. Representative Duncan Hunter of California proposed a plan on November 3, 2005, calling for the construction of a reinforced fence along the entire United States–Mexico border. This would also have included a border zone on the U.S. side. On December 15, 2005, Congressman Hunter's amendment to the Border Protection, Anti-terrorism, and Illegal Immigration Control Act of 2005 (H.R. 4437) passed in the House, but the bill did not pass the Senate. This plan called for mandatory fencing along 698 miles (1,123 km) of the 1,954-mile (3,145-kilometer)-long border. On May 17, 2006, the U.S. Senate proposed the Comprehensive Immigration Reform Act of 2006 (S. 2611), which would include of triple-layered fencing and a vehicle fence, but the bill died in committee.


Secure Fence Act of 2006

The Secure Fence Act of 2006, signed into law on October 26, 2006, by President George W. Bush authorized and partially funded the potential construction of 700 miles (1,125 km) of physical fence/barriers along the Mexican border. The bill passed with supermajorities in both chambers. Secretary of Homeland Security
Michael Chertoff Michael Chertoff (born November 28, 1953) is an American attorney who was the second United States Secretary of Homeland Security to serve under President George W. Bush. Chertoff also served for one additional day under President Barack Obama. ...
announced that an eight-month test of the virtual fence he favored would precede any construction of a physical barrier. The government of Mexico and ministers of several
Latin America Latin America or * french: Amérique Latine, link=no * ht, Amerik Latin, link=no * pt, América Latina, link=no, name=a, sometimes referred to as LatAm is a large cultural region in the Americas where Romance languages — languages derived ...
n countries condemned the plans.
Governor of Texas The governor of Texas heads the state government of Texas. The governor is the leader of the executive and legislative branch of the state government and is the commander in chief of the Texas Military. The current governor is Greg Abbott, w ...
Rick Perry James Richard Perry (born March 4, 1950) is an American politician who served as the 14th United States secretary of energy from 2017 to 2019 and as the 47th governor of Texas from 2000 to 2015. Perry also ran unsuccessfully for the Republic ...
expressed his opposition, saying that the border should be more open and should support safe and legal migration with the use of technology. The barrier expansion was opposed by a unanimous vote by the
Laredo, Texas Laredo ( ; ) is a city in and the county seat of Webb County, Texas, United States, on the north bank of the Rio Grande in South Texas, across from Nuevo Laredo, Tamaulipas, Mexico. Laredo has the distinction of flying seven flags (the Flag of th ...
, City Council.James Rowley
"U.S.–Mexico Border Fence Plan Will Be 'Revisited' By Congress," Bloomberg
January 17, 2007.
Laredo Mayor Raul G. Salinas said that the bill would devastate Laredo. He stated "These are people that are sustaining our economy by forty percent, and I am gonna close the door on them and put pa wall? You don't do that. It's like a slap in the face." He hoped that Congress would revise the bill to better reflect the realities of life on the border. Secretary Chertoff exercised his waiver authority on April 1, 2008, to "waive in their entirety" the
Endangered Species Act The Endangered Species Act of 1973 (ESA or "The Act"; 16 U.S.C. § 1531 et seq.) is the primary law in the United States for protecting imperiled species. Designed to protect critically imperiled species from extinction as a "consequence of ec ...
, the
Migratory Bird Treaty Act The Migratory Bird Treaty Act of 1918 (MBTA), codified at (although §709 is omitted), is a United States federal law, first enacted in 1918 to implement the convention for the protection of migratory birds between the United States and Canada . ...
, the
National Environmental Policy Act The National Environmental Policy Act (NEPA) is a United States environmental law that promotes the enhancement of the environment and established the President's Council on Environmental Quality (CEQ). The law was enacted on January 1, 1970.Un ...
, the
Coastal Zone Management Act The Coastal Zone Management Act of 1972 (CZMA; , , Chapter 33) is an Act of Congress passed in 1972 to encourage coastal states to develop and implement coastal zone management plans (CZMPs). This act was established as a United States National po ...
, the
Clean Water Act The Clean Water Act (CWA) is the primary federal law in the United States governing water pollution. Its objective is to restore and maintain the chemical, physical, and biological integrity of the nation's waters; recognizing the responsibiliti ...
, the Clean Air Act, and the
National Historic Preservation Act The National Historic Preservation Act (NHPA; Public Law 89-665; 54 U.S.C. 300101 ''et seq.'') is legislation intended to preserve historic and archaeological sites in the United States of America. The act created the National Register of Historic ...
to extend triple fencing through the
Tijuana River National Estuarine Research Reserve Tijuana River National Estuarine Research Reserve is a natural reserve in Imperial Beach, California and San Ysidro, San Diego. It encompasses the Tijuana River Estuary, located on the Mexico–United States border. It is divided into two part ...
near San Diego. By January 2009, U.S. Customs and Border Protection and Homeland Security had spent $40 million on environmental analysis and mitigation measures aimed at blunting any possible adverse impact that the fence might have on the environment. On January 16, 2009, DHS announced it was pledging an additional $50 million for that purpose, and signed an agreement with the U.S. Department of the Interior for utilization of the additional funding. In January 2009, U.S. Customs and Border Protection reported that it had more than of barriers in place.


Obama administration

On March 16, 2010, DHS announced that there would be a halt to expand the virtual fence beyond two pilot projects in Arizona. Contractor Boeing Corporation had numerous delays and cost overruns. Boeing had initially used police-dispatching software that was unable to process all of the information coming from the border. The $50 million of remaining funding would be used for mobile surveillance devices, sensors, and radios to patrol and protect the border. At the time, DHS had spent $3.4 billion on border fences and had built of fences and barriers as part of the Secure Border Initiative. In May 2011, President Barack Obama stated that the wall was "basically complete", with of 652 planned miles of barrier constructed. Of this, vehicle barriers comprised and pedestrian fence . Obama stated that:
We have gone above and beyond what was requested by the very Republicans who said they supported broader reform as long as we got serious about enforcement. All the stuff they asked for, we've done. But ... I suspect there are still going to be some who are trying to move the goal posts on us one more time. They'll want a higher fence. Maybe they'll need a moat. Maybe they want alligators in the moat. They'll never be satisfied. And I understand that. That's politics.
The Republican Party's 2012 platform stated that "The double-layered fencing on the border that was enacted by Congress in 2006, but never completed, must finally be built." The Secure Fence Act's costs were estimated at $6 billion, more than the Customs and Border Protection's entire annual discretionary budget of $5.6 billion. The
Washington Office on Latin America The Washington Office on Latin America (WOLA) is a United States non-governmental organization (NGO) whose stated goal is to promote human rights, democracy, and social and economic justice in Latin America and the Caribbean. The Washington Offic ...
noted in 2013 that the cost of complying with the Secure Fence Act's mandate was the reason that it had not been completely fulfilled. A 2016 report by the
Government Accountability Office The U.S. Government Accountability Office (GAO) is a legislative branch government agency that provides auditing, evaluative, and investigative services for the United States Congress. It is the supreme audit institution of the federal gover ...
confirmed that the government had completed the fence by 2015.Annie Linskey
In 2006, Democrats were saying 'build that fence!'
''Boston Globe'' (January 27, 2017).
A 2017 report noted that "In addition to the 654 miles of primary fencing, ustoms and Border Protectionhas also deployed additional layers of pedestrian fencing behind the primary border fencing, including 37 miles of secondary fencing and 14 miles of tertiary fencing."


Trump administration

Throughout his
2016 presidential campaign This national electoral calendar for 2016 lists the national/ federal elections held in 2016 in all sovereign states and their dependent territories. By-elections are excluded, though national referendums are included. January *7 January: Kiri ...
,
Donald Trump Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who served as the 45th president of the United States from 2017 to 2021. Trump graduated from the Wharton School of the University of P ...
called for the construction of a much larger and fortified border wall, claiming that if elected, he would "build the wall and make Mexico pay for it". Mexican President
Enrique Peña Nieto Enrique Peña Nieto (; born 20 July 1966), commonly referred to by his initials EPN, is a Mexican politician who served as the 64th president of Mexico from 1 December 2012 to 30 November 2018. A member of the Institutional Revolutionary Party ...
maintained that his country would not pay for the wall. On January 25, 2017, the Trump administration signed Executive Order 13767, which formally directed the US government to begin attempting to construct a border wall using existing federal funding, although construction did not begin at this time because a formal budget had not been developed. Trump's campaign promise has faced a host of legal and logistical challenges since. In March 2018, the Trump administration secured $1.6 billion from Congress for projects at the border for existing designs of approximately 100 miles of new and replacement walls. From December 22, 2018, to January 25, 2019, the federal government was partially shut down because of Trump's declared intention to veto any spending bill that did not include $5 billion in funding for a border wall. On May 24, 2019, federal Judge Haywood Gilliam in the Northern District of California granted a preliminary injunction preventing the Trump administration from redirecting funds under the national emergency declaration issued earlier in the year to fund a planned wall along the border with Mexico. The injunction applies specifically to money the administration intended to allocate from other agencies and limits wall construction projects in El Paso and Yuma. On June 28, Gilliam blocked the reallocation of $2.5 billion of funding from the
Department of Defense Department of Defence or Department of Defense may refer to: Current departments of defence * Department of Defence (Australia) * Department of National Defence (Canada) * Department of Defence (Ireland) * Department of National Defense (Philipp ...
to the construction of segments of the border wall categorized as high priority by the Trump administration (spanning across Arizona, California and New Mexico). The decision was upheld five days later by a majority in the Ninth Circuit Appeals Court but was overturned by the U.S. Supreme Court on July 26. On September 3, Secretary of Defense
Mark Esper Mark Thomas Esper (born April 26, 1964) is an American politician and manufacturing executive who served as the 27th United States secretary of defense from 2019 to 2020. A member of the Republican Party, he had previously served as the 23rd U ...
authorized the use of $3.6 billion in military construction funding for 175 miles of the barrier. The House and Senate have twice voted to terminate Trump's emergency declaration, but the president vetoed both resolutions. In October, a lawsuit filed in El Paso County produced a ruling that the emergency declaration was unlawful, as it fails to meet the
National Emergencies Act The National Emergencies Act (NEA) (, codified at –1651) is a United States federal law passed to end all previous national emergencies and to formalize the emergency powers of the President. The Act empowers the President to activate speci ...
's definition of an emergency. On December 10, a federal judge in the case blocked the use of the funding, but on January 8, 2020, a
federal appeals court The United States courts of appeals are the intermediate appellate courts of the United States federal judiciary. The courts of appeals are divided into 11 numbered circuits that cover geographic areas of the United States and hear appeals fro ...
granted a
stay Stay may refer to: Places * Stay, Kentucky, an unincorporated community in the US Law * Stay of execution, a ruling to temporarily suspend the enforcement of a court judgment * Stay of proceedings, a ruling halting further legal process in a tri ...
of the ruling, freeing $3.6 billion for the wall. , the Trump administration's barrier construction had been limited to replacing sections that were in need of repair or outdated, with 60 miles of replacement wall built in the Southwest since 2017. As of September 12, 2019, the Trump administration plans for "Between 450 and 500 miles (724–806 kilometers) of fencing along the nearly 2,000-mile (3,218-kilometer) border by the end of 2020" with an estimated total cost of $18.4 billion. Privately owned land adjacent to the border would have to be acquired by the U.S. government to be built upon. On June 23, Trump visited Yuma, Arizona, for a campaign rally commemorating the completion of of the wall. U.S. Customs and Border Protection confirmed that almost all of this was replacement fencing. By the end of Trump's term on January 21, 2021, had been built at last report by CBP on January 5th, much of it replacing outdated or dilapidated existing barriers.


Contractors and independent efforts

As of February 2019, contractors were preparing to construct $600 million worth of replacement barriers along the south Texas Rio Grande Valley section of the border wall, approved by Congress in March 2018. In mid-April 2019, former Kansas Secretary of State
Kris Kobach Kris William Kobach ( ; born March 26, 1966) is an American lawyer and politician who is the Attorney General of Kansas. He previously served as the 31st Secretary of State of Kansas. A former Chairman of the Kansas Republican Party, Kobach cam ...
visited
Coolidge, Arizona Coolidge is a city in Pinal County, Arizona, United States. According to the 2020 census, the city's population is 13,218. Coolidge is home of the Casa Grande Ruins National Monument. The monument was the first historic site to receive protect ...
, to observe a demonstration by
North Dakota North Dakota () is a U.S. state in the Upper Midwest, named after the indigenous Dakota Sioux. North Dakota is bordered by the Canadian provinces of Saskatchewan and Manitoba to the north and by the U.S. states of Minnesota to the east, ...
's
Fisher Industries Fisher Industries is a privately held construction company based in Dickinson, North Dakota, founded by Gene Fisher in 1952 and led in turn by sons David Fisher, Micheal Fisher, and Tommy Fisher. It is the parent company of Fisher Sand and Gravel, ...
of how it would build a border fence. The company maintained that it could erect 218 miles of the barrier for $3.3 billion and be able to complete it in 13 months. Spin cameras positioned atop the fence would use facial-recognition technology, and underground fiber optic cables could detect and differentiate between human activity, vehicles, tunneling, and animals as distant as 40 feet away. The proposed barrier would be constructed with 42 miles (68 km) near Yuma and 91 miles (147 km) near
Tucson, Arizona , "(at the) base of the black ill , nicknames = "The Old Pueblo", "Optics Valley", "America's biggest small town" , image_map = , mapsize = 260px , map_caption = Interactive map ...
, 69 miles near El Paso, Texas, and 15 miles (25 km) near El Centro, California—reportedly costing $12.5 million per mile. In April 2019, U.S. Senator
Bill Cassidy William Morgan Cassidy (born September 28, 1957) is an American physician and politician serving as the senior United States senator from Louisiana, a seat he has held since 2015. A member of the Republican Party, he served in the Louisiana ...
said that he traveled with the group of politicians and administration officials over the Easter recess to Coolidge (120 miles north of the Mexico border) because he felt that insufficient barrier and border enhancements had been erected since Trump became president.Kris Kobach and fellow border hawks join Army Corps in Arizona to see company's border fence proposal
''
Washington Examiner The ''Washington Examiner'' is an American conservative news outlet which consists principally of an online/digital website with a weekly magazine, based in Washington, D.C. It is owned by MediaDC, a subsidiary of Clarity Media Group, which is ...
'', Anna Giaritelli, April 16, 2019. Retrieved April 19, 2019.
U.S. senator
Kevin Cramer Kevin John Cramer (born January 21, 1961) is an American politician who has served as the junior United States senator for North Dakota since 2019. A member of the Republican Party, he represented North Dakota's at-large congressional distri ...
was also there, promoting Fisher Industries, which demonstrated the construction of a 56-foot (18 m) fence in Coolidge. A private organization founded by military veteran
Brian Kolfage Brian Kolfage is an American political activist, former United States Air Force airman, and convicted fraudster. He co-founded We Build the Wall, a private organization that purportedly aimed to construct a privately funded barrier on the Mexi ...
called "
We Build the Wall We Build the Wall is an organization that solicited donations to build private sections of the wall along the Mexico–U.S. border. It started as a GoFundMe campaign by United States Air Force veteran Brian Kolfage in December 2018. Kolfage a ...
" raised over $20 million beginning in 2018, with President Trump's encouragement and with leadership from Kobach and
Steve Bannon Stephen Kevin Bannon (born November 27, 1953) is an American media executive, political strategist, and former investment banker. He served as the White House's chief strategist in the administration of U.S. president Donald Trump during t ...
. Over the 2019
Memorial Day Memorial Day (originally known as Decoration Day) is a federal holiday in the United States for mourning the U.S. military personnel who have fought and died while serving in the United States armed forces. It is observed on the last Monda ...
weekend, the organization constructed a 1/2 to 1-mile "weathered steel" bollard fence near El Paso on private land adjoining the US–Mexico border using $6–8 million of the donated funds. Kolfage's organization says it has plans to construct further barriers on private lands adjoining the border in Texas and California. On December 3, 2019, a Hidalgo County judge ordered the group to temporarily halt all construction because of its plans to build adjacent to the Rio Grande, which a lawyer for the
National Butterfly Center The National Butterfly Center is a private nature preserve operated by the North American Butterfly Association that serves as an outdoor butterfly conservatory. It is located adjacent to Bentsen-Rio Grande Valley State Park, near the city of M ...
argues would create a flooding risk. On January 9, 2020, a federal judge lifted an injunction, allowing a construction firm to move forward with the 3 mile project along the Rio Grande. This ended a month long court battle with both the Federal Government and the National Butterfly Center which both tried to block construction efforts.


Biden administration

President Joe Biden signed an executive order on his first day of office, January 20, 2021, ordering a "pause" in all construction of the wall no later than January 27. The government was given two months to plan how to spend the funds elsewhere and determine how much it would cost to terminate the contracts. There are no plans to tear down parts of the wall that have been built. The deployment of 3,000 National Guard troops along the border will continue. The Biden administration has continued to seize land for construction of the border wall. By December 2021, many contracts had been cancelled, including one requiring the possession of the land of a family represented by the Texas Civil Rights Project. In June 2021, Texas governor
Greg Abbott Gregory Wayne Abbott (born November 13, 1957) is an American politician, attorney, and former jurist serving as the 48th governor of Texas since 2015. A member of the Republican Party, he served as the 50th attorney general of Texas from 2002 ...
announced plans to build a border wall in his state, saying that the state would provide $250 million and that direct donations from the public would be solicited. On June 29, the
Republican Study Committee The Republican Study Committee (RSC) is a study group of conservative members of the Republican Party in the United States House of Representatives. As of 2021, the Chairman of the RSC is Representative Jim Banks of Indiana. Although the prima ...
organized a group of two dozen Republican House members to visit a gap in the border where Central Americans were crossing into the country. Representative Mary Miller stated that "obviously our president has advertised this and facilitated this invasion". Rep.
Jim Banks James Edward Banks (born July 16, 1979) is an American politician serving as the U.S. representative for since 2017. A Republican, he previously served as a member of the Indiana Senate from 2010 to 2016. Early life and career Banks was bo ...
praised the effectiveness of Trump's wall and said that because of the halted construction, "thousands of migrants
ass Ass most commonly refers to: * Buttocks (in informal American English) * Donkey or ass, ''Equus africanus asinus'' **any other member of the subgenus ''Asinus'' Ass or ASS may also refer to: Art and entertainment * ''Ass'' (album), 1973 albu ...
through this area on a regular basis ... because there's an open door that allows them to do that". In reference to wristbands on migrants used by Mexican cartels and smugglers to track them, Rep.
Madison Cawthorn David Madison Cawthorn (born August 1, 1995) is an American politician who served as the U.S. representative for North Carolina's 11th congressional district from 2021 to 2023. Cawthorn became the first member of Congress born in the 1990s and d ...
stated, "They're basically treating people like
Amazon Amazon most often refers to: * Amazons, a tribe of female warriors in Greek mythology * Amazon rainforest, a rainforest covering most of the Amazon basin * Amazon River, in South America * Amazon (company), an American multinational technolog ...
products. ... There is no care that that is a human being, someone who has a soul, someone who has unalienable rights that predate any government." On July 28, 2022, the Biden administration announced it would fill four wide gaps in Arizona near Yuma, an area with some of the busiest corridors for illegal crossings.


Binational River Park

In 2021, in collaboration with United States and Mexican ambassadors, as well as businessmen, a binational park was proposed along the
Rio Grande The Rio Grande ( and ), known in Mexico as the Río Bravo del Norte or simply the Río Bravo, is one of the principal rivers (along with the Colorado River) in the southwestern United States and in northern Mexico. The length of the Rio G ...
between the border towns of
Laredo, Texas Laredo ( ; ) is a city in and the county seat of Webb County, Texas, United States, on the north bank of the Rio Grande in South Texas, across from Nuevo Laredo, Tamaulipas, Mexico. Laredo has the distinction of flying seven flags (the Flag of th ...
, and
Nuevo Laredo, Mexico Nuevo Laredo () is a city in the Municipality of Nuevo Laredo in the Mexican state of Tamaulipas. The city lies on the banks of the Rio Grande, across from Laredo, United States. The 2010 census population of the city was 373,725. Nuevo Lar ...
. Supported by the No Border Wall Coalition, the park aims to create a shared recreational space instead of a border wall.
Earthjustice Earthjustice (originally Sierra Club Legal Defense Fund) is a nonprofit public interest organization based in the United States dedicated to litigating environmental issues. Headquartered in San Francisco, it has 14 regional offices across the Un ...
estimated that the decision to not build a border wall in Laredo saved 71 miles of river from destruction and over $1 billion in taxpayer dollars.


Arizona container wall

In August 2022,
Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...
Governor
Doug Ducey Douglas Anthony Ducey (, né Roscoe Jr.; born April 9, 1964) is an American businessman and politician serving as the 23rd governor of Arizona since 2015. A member of the Republican Party, Ducey was previously the CEO of Cold Stone Creamery, a c ...
ordered the erection of a makeshift wall of shipping containers on the border with Mexico in
Cochise County, Arizona Cochise County () is a county in the southeastern corner of the U.S. state of Arizona. It is named after the Native American chief Cochise. The population was 125,447 at the 2020 census. The county seat is Bisbee and the most populous city ...
. The construction began in the Coronado National Forest without authorization from the
U.S. Forest Service The United States Forest Service (USFS) is an agency of the U.S. Department of Agriculture that administers the nation's 154 national forests and 20 national grasslands. The Forest Service manages of land. Major divisions of the agency inc ...
, which operates the land. Ecologists at the Center for Biological Diversity argue that the construction, which imperils at-risk species including the
ocelot The ocelot (''Leopardus pardalis'') is a medium-sized spotted wild cat that reaches at the shoulders and weighs between on average. It was first described by Carl Linnaeus in 1758. Two subspecies are recognized. It is native to the southwe ...
and
jaguar The jaguar (''Panthera onca'') is a large cat species and the only living member of the genus ''Panthera'' native to the Americas. With a body length of up to and a weight of up to , it is the largest cat species in the Americas and the th ...
, violates the
Endangered Species Act of 1973 The Endangered Species Act of 1973 (ESA or "The Act"; 16 U.S.C. § 1531 et seq.) is the primary law in the United States for protecting imperiled species. Designed to protect critically imperiled species from extinction as a "consequence of ec ...
and have sued to halt its construction. Additionally, Governor-elect
Katie Hobbs Kathleen Marie Hobbs (born December 28, 1969) is an American politician and social worker who is the governor-elect of Arizona, having been elected in 2022. She has served as the 21st secretary of state of Arizona since 2019. A member of the ...
stated that she would remove the containers after taking office, and the U.S. Justice Department sued the state to remove the containers and "compensate the .S.for any actions it needs to take to undo Arizona's actions".


Controversy


Effectiveness

Research at
Texas A&M University Texas A&M University (Texas A&M, A&M, or TAMU) is a public university, public, Land-grant university, land-grant, research university in College Station, Texas. It was founded in 1876 and became the flagship institution of the Texas A&M Unive ...
and
Texas Tech University Texas Tech University (Texas Tech, Tech, or TTU) is a public research university in Lubbock, Texas. Established on , and called Texas Technological College until 1969, it is the main institution of the five-institution Texas Tech University Sy ...
indicates that the wall, like border walls in general, is unlikely to be effective at reducing illegal immigration or movement of contraband. In mid-April 2019, U.S. Senator
Martha McSally Martha Elizabeth McSally (born March 22, 1966) is an American politician and former military pilot who served as a United States senator for Arizona from 2019 to 2020. A member of the Republican Party, she served as the U.S. representative for ...
said that a barrier will not resolve the border crisis. Authors of books on the effectiveness have said that aside from the human crossings, drugs among other things will still be making their way to the United States illegally. However, US Customs and Border Protection has frequently called for more physical barriers on the Mexico–United States border, citing their efficacy. Smugglers in 2021 used demolition tools and power saws on pieces of wall in Arizona.


Divided land

Tribal lands of three indigenous nations are divided by a proposed border fence.O'odham tell U.N. rapporteur of struggles
Indian Country, October 31, 2005

''
Washington Post ''The Washington Post'' (also known as the ''Post'' and, informally, ''WaPo'') is an American daily newspaper published in Washington, D.C. It is the most widely circulated newspaper within the Washington metropolitan area and has a large na ...
'', September 15, 2006
On January 27, 2008, a Native American human rights delegation in the United States, which included Margo Tamez (Lipan Apache-Jumano Apache) and Teresa Leal (Opata-Mayo) reported the removal of the official International Boundary obelisks of 1848 by the U.S. Department of Homeland Security in the Las Mariposas, Sonora-Arizona sector of the Mexico–U.S. border. The obelisks were moved southward approximately , onto the property of private landowners in Sonora, as part of the larger project of installing the steel barrier wall. The proposed route for the border fence would divide the campus of the University of Texas at Brownsville into two parts, according to Antonio N. Zavaleta, a vice president of the university."Some Texans Fear Border Fence Will Sever Routine of Daily Life"
''New York Times'', June 20, 2007
There have been campus protests against the wall by students who feel it will harm their school. In August 2008, UT-Brownsville reached an agreement with the U.S. Department of Homeland Security for the university to construct a portion of the fence across and adjacent to its property. On August 20, 2008, the university sent out a request for bids for the construction of a high barrier that incorporates technology security for its segment of the border fence project. The southern perimeter of the UT-Brownsville campus will be part of a laboratory for testing new security technology and infrastructure combinations. The border fence segment on the campus was substantially completed by December 2008. The SpaceX South Texas Launch Site was shown on a map of the Department of Homeland Security with the barrier cutting through the in Boca Chica, Texas.


Santa Ana National Wildlife Refuge

On August 1, 2018, the chief of the Border Patrol's Rio Grande Valley sector indicated that although Starr County was his first priority for a wall, Hidalgo County's Santa Ana National Wildlife Refuge had been selected instead for initial construction, because its land was owned by the government.


National Butterfly Center

The proposed border wall has been described as a "death sentence" for the American
National Butterfly Center The National Butterfly Center is a private nature preserve operated by the North American Butterfly Association that serves as an outdoor butterfly conservatory. It is located adjacent to Bentsen-Rio Grande Valley State Park, near the city of M ...
, a privately operated outdoor
butterfly conservatory A butterfly house, conservatory, or lepidopterarium is a facility which is specifically intended for the breeding and display of butterflies with an emphasis on education. Some butterfly houses also feature other insects and arthropods. Butterf ...
that maintains a significant amount of land in Mexico. Filmmaker Krista Schlyer, part of an all-woman team creating a documentary film about the butterflies and the border wall, ''Ay Mariposa'', estimates that construction would put "70 percent of the preserve habitat" on the Mexican side of the border. In addition to concerns about seizure of private property by the federal government, center employees have also noted the local economic impact. The center's director has stated that "environmental tourism contributes more than $450m to Hidalgo and Starr counties." In early December 2018, a challenge to wall construction at the National Butterfly Center was rejected by the U.S. Supreme Court. According to the '' San Antonio Express News'', "the high court let stand an appeals ruling that lets the administration bypass 28 federal laws", including the Endangered Species Act, the Safe Drinking Water Act and the
Native American Graves Protection and Repatriation Act The Native American Graves Protection and Repatriation Act (NAGPRA), Pub. L. 101-601, 25 U.S.C. 3001 et seq., 104 Stat. 3048, is a United States federal law enacted on November 16, 1990. The Act requires federal agencies and institutions tha ...
.


Mexico's condemnations

In 2006, the Mexican government vigorously condemned the Secure Fence Act of 2006. Mexico has also urged the U.S. to alter its plans for expanded fences along their shared border, saying that it would damage the environment and harm wildlife. In 2012,
Enrique Peña Nieto Enrique Peña Nieto (; born 20 July 1966), commonly referred to by his initials EPN, is a Mexican politician who served as the 64th president of Mexico from 1 December 2012 to 30 November 2018. A member of the Institutional Revolutionary Party ...
was campaigning in
Tijuana Tijuana ( ,"Tijuana"
(US) and
< ...
at the Playas de Monumental, less than from the U.S.–Mexico border adjacent to Border Field State Park. In one of his speeches he criticized the U.S. government for building the barriers and asked for them to be removed, referencing President Ronald Reagan's "
Tear down this wall! "Mr. Gorbachev, tear down this wall", also known as the Berlin Wall Speech, was a speech delivered by United States President Ronald Reagan in West Berlin on June 12, 1987. Reagan called for the General Secretary of the Communist Party of the So ...
" speech from Berlin in 1987.


Migrant deaths

Between 1994 and 2007, there were around 5,000
migrant deaths along the Mexico–United States border United States border with Mexico is one of the world's "most lethal land borders". Hundreds of migrants die per year as they attempt to cross into the United States from Mexico illegally. The US Border Patrol reported 251 migrant deaths in the fi ...
, according to a document created by the Human Rights National Commission of Mexico, also signed by the
American Civil Liberties Union The American Civil Liberties Union (ACLU) is a nonprofit organization founded in 1920 "to defend and preserve the individual rights and liberties guaranteed to every person in this country by the Constitution and laws of the United States". T ...
. Between 43 and 61 people died trying to cross the Sonoran Desert from October 2003 to May 2004; three times that of the same period the previous year. In October 2004, the Border Patrol announced that 325 people had died crossing the entire border during the previous 12 months. Between 1998 and 2004, 1,954 persons are officially reported to have died along the Mexico–U.S. border. Since 2004, the bodies of 1,086 migrants have been recovered in the southern Arizona desert. U.S. Border Patrol Tucson Sector reported on October 15, 2008, that its agents were able to save 443 illegal immigrants from certain death after being abandoned by their smugglers. The agents also reducing the number of deaths by 17% from 202 in 2007 to 167 in 2008. Without the efforts of these agents, hundreds more could have died in the deserts of Arizona. According to the same sector, border enhancements like the wall have allowed the Tucson Sector agents to reduce the number of apprehensions at the borders by 16% compared with 2007.


Environmental impact

In April 2008, the Department of Homeland Security announced plans to waive more than 30 environmental and cultural laws to speed construction of the barrier. Despite claims from then Homeland Security Chief Michael Chertoff that the department would minimize the construction's impact on the environment, critics in Arizona, New Mexico, and Texas, asserted that the fence endangered species and fragile ecosystems along the Rio Grande. Environmentalists expressed concern about butterfly migration corridors and the future of species of local wildcats, the
ocelot The ocelot (''Leopardus pardalis'') is a medium-sized spotted wild cat that reaches at the shoulders and weighs between on average. It was first described by Carl Linnaeus in 1758. Two subspecies are recognized. It is native to the southwe ...
, the
jaguarundi The jaguarundi (''Herpailurus yagouaroundi'') is a wild cat native to the Americas. Its range extends from central Argentina in the south to northern Mexico, through Central and South America east of the Andes. The jaguarundi is a medium-size ...
, and the
jaguar The jaguar (''Panthera onca'') is a large cat species and the only living member of the genus ''Panthera'' native to the Americas. With a body length of up to and a weight of up to , it is the largest cat species in the Americas and the th ...
. By August 2008, more than 90% of the southern border in Arizona and New Mexico had been surveyed. In addition, 80% of the California–Mexico border has been surveyed. About 100 species of plants and animals, many already endangered, are threatened by the wall, including the jaguar, ocelot,
Sonoran pronghorn The Sonoran pronghorn (''Antilocapra americana sonoriensis'') is an endangered subspecies of pronghorn that is endemic to the Sonoran Desert. Conservation Around 200 animals currently are believed to exist in Arizona in the United States, ...
, Mexican wolf, a pygmy owl, the thick-billed parrot, and the Quino checkerspot butterfly. According to Scott Egan of
Rice University William Marsh Rice University (Rice University) is a Private university, private research university in Houston, Houston, Texas. It is on a 300-acre campus near the Houston Museum District and adjacent to the Texas Medical Center. Rice is ranke ...
, a wall can create a
population bottleneck A population bottleneck or genetic bottleneck is a sharp reduction in the size of a population due to environmental events such as famines, earthquakes, floods, fires, disease, and droughts; or human activities such as specicide, widespread violen ...
, increase
inbreeding Inbreeding is the production of offspring from the mating or breeding of individuals or organisms that are closely related genetically. By analogy, the term is used in human reproduction, but more commonly refers to the genetic disorders a ...
, and cut off natural migration routes and range expansion. In 2008 a resolution "based on sound and accurate scientific knowledge" expressing opposition to the wall and the harmful impact on several rare, threatened, and endangered species, particularly endangered mammals such as the jaguar, ocelot, jaguarondi, and Sonoran pronghorn, was published by The Southwestern Association of Naturalists, an organization of 791 scientists specializing in the zoology, botany, and ecology of southwestern USA and Mexico. A decade later in 2018, well over 2500 scientists from 43 countries published a statement opposing the Border Wall, affirming it will have "significant consequences for biodiversity" and "Already-built sections of the wall are reducing the area, quality, and connectivity of plant and animal habitats and are compromising more than a century of binational investment in conservation." An initial wall for which U.S. funding has been requested on the nearly mile border would pass through the
Tijuana Slough National Wildlife Refuge Tijuana Slough National Wildlife Refuge is located in the most southwestern corner of the contiguous United States. As a National Wildlife Refuge, it is administered by the U.S. Fish and Wildlife Service. It was established in 1980. The refuge for ...
in California, the Santa Ana National Wildlife Refuge and Lower Rio Grande Valley National Wildlife Refuge in Texas, and Mexico's Cabeza Prieta National Wildlife Refuge and
El Pinacate y Gran Desierto de Altar Biosphere Reserve El Pinacate y Gran Desierto de Altar Biosphere Reserve ( es, Reserva de la Biosfera El Pinacate y Gran Desierto de Altar) is a biosphere reserve and UNESCO World Heritage Site managed by the federal government of Mexico, specifically by Sec ...
, which is a UNESCO
World Heritage Site A World Heritage Site is a landmark or area with legal protection by an international convention administered by the United Nations Educational, Scientific and Cultural Organization (UNESCO). World Heritage Sites are designated by UNESCO for ...
that the U.S. is bound by global treaty to protect. The U.S. Customs and Border Protection plans to build the wall using the Real ID Act to avoid the process of making environmental impact statements, a strategy devised by Chertoff during the Bush administration. Reuters said, "The Real ID Act also allows the secretary of Homeland Security to exempt CBP from adhering to the Endangered Species Act", which would otherwise prohibit construction in a wildlife refuge.


Polling

A Rasmussen Reports poll from August 19, 2015, found that 51% supported building a wall on the border, while 37% opposed. In a January 2017 study conducted by the Pew Research Center, 39% of Americans identified construction of a U.S.–Mexico border wall as an "important goal for U.S. immigration policy". The survey found that while Americans were divided by party on many different immigration policies, "the widest artisan splitby far is over building a southern border wall. Two-thirds of Republicans and Republican-leaning independents (67%) say construction of a wall on the U.S.–Mexico border is an important goal for immigration policy, compared with just 16 percent of Democrats and Democratic leaners." A survey conducted by the
National Border Patrol Council The National Border Patrol Council (NBPC) is a labor union established in 1967 that represents agents and support staff on the United States Border Patrol. It is an affiliate of the American Federation of Government Employees, and through that l ...
found that 89% of border patrol agents said a "wall system in strategic locations is necessary to securing the border". 7% of agents disagreed. A poll conducted by CBS in June 21–22 2018 found that 51% supported the border wall, while 48% opposed. A poll conducted by the Senate Opportunity Fund in March of 2021 found that 53% supported finishing construction of the border wall, while 38% opposed.


See also

*
Mexico–United States border The Mexico–United States border ( es, frontera Estados Unidos–México) is an international border separating Mexico and the United States, extending from the Pacific Ocean in the west to the Gulf of Mexico in the east. The border trave ...
* Mexico–United States border crisis * List of Mexico–United States border crossings * United States Border Patrol interior checkpoints * Roosevelt Reservation *
List of walls See List of fortifications for a list of notable fortified structures. For city walls in particular, see List of cities with defensive walls. Pre-modern fortifications * The Great Wall of China, China - part of UNESCO site 438,. This is ...
* Open border * Tortilla Wall * Border barrier * Separation barrier * Guatemala–Mexico border *
Israeli West Bank barrier The Israeli West Bank barrier, comprising the West Bank Wall and the West Bank fence, is a separation barrier built by Israel along the Green Line and inside parts of the West Bank. It is a contentious element of the Israeli–Palestinian ...
*
Egypt–Israel barrier The Egypt–Israel barrier or Egypt–Israel border fence ( he, שְׁעוֹן הַחוֹל, translit=Shaʽon HaḤol, lit=sand clock) refers to a separation barrier built by Israel along its border with Egypt. Initial construction on the ...
* Hungarian border barrier


References

Footnotes Citations


Further reading

* Chaichian, Mohammad. 2014. Empires and Walls: Globalization, Migration, and Colonial Domination (Brill, pp. 175–235) * *
The High Cost and Diminishing Returns of a Border Wall


External links


Border Wall System
CBP.gov
This Is What the U.S.–Mexico Border Wall Actually Looks Like
National Geographic Society The National Geographic Society (NGS), headquartered in Washington, D.C., United States, is one of the largest non-profit scientific and educational organizations in the world. Founded in 1888, its interests include geography, archaeology, ...

US–Mexico Border Barriers, Historical Timeline and Summary Statistics
{{DEFAULTSORT:Mexico-United States Barrier Anti-immigration politics in the United States Border barriers Fortifications in the United States Barrier 1994 establishments in Mexico 1993 establishments in the United States